On Mon, 30 Apr 2007, Pedro Mardones wrote: > Dear R users; > > Is there any way to intersect a filled contour image and a polygon? My > problem is that I want to create a kriging map and the boundaries of > my map are given by the coordinates of the polygon. > > So far I can superompose the polygon in the filled.contour image but I > don't know how to get rid of the contour image outside of the polygon > boundaries.
Two possibilities seem to be present: define your polygon as a hole inside the bounding box of the image, with a link between the polygon and the bounding box, and fill it; or, perhaps better, only make kriging predictions for the polygon. Since you haven't given a code example, it isn't obvious how you are making the kriging predictions, but the choice of the newdata locations ought to decide - and they do not need to be a full grid, or even a regular grid at all. If you need to follow this up, please consider using the R-sig-geo list. > > Any hint will be appreciated > PM > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: [EMAIL PROTECTED] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.